BK Precision 1601 Instruction Manual

INSTRUCTION MANUAL

FOR

B & K-PRECISION

MODEL 1601

SOLID STATE

REGULATED DC POWER

SUPPLY

DYNASCAN

CORPORATION

6460 West

Cortland

Street

Chicago, Illinois 60635

CONTENTS

Page

SPECIFICATIONS

. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

FEATURES . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.

3

INTRODUCTION

.....................................................

4

CONTROLS AND INDICATORS

........................................

4

OPERATING INSTRUCTIONS

.........................................

5

APPLICATIONS

.....................................................

6

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

Electronic Servicing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

Servicing Battery Operated Equipment

.........................

6

Servicing Vehicular Electronics Equipment

.....................

7

Servicing Plug-In Modules.................................... 9

Using Two Power Supplies For Two Output Voltages............9

Two Power Supplies In Series For O-100 Volt Output . . . . . . . . . . . . 9

Using The Power Supply As A Battery Charger

. . .

. . . . . . ... ........... 10

Other Servicing Applications

.................................

10

Electronics Manufacturing

........................................

10

Electronics Design Engineering

.

....................................

11

Electronics Education

............................................

11

CIRCUIT DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12

MAINTENANCE

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . ..*.................

14

OUTPUT VOLTAGE

OUTPUT CURRENT

CUMNF&~

LOAD REGULATION

FULLY SOLID STATE

CURRENT LIMITING/
OVERLOAD
PROTECTION

SIMPLIFIED

ZZll&TING

(0-50 VDC

0-2

AMPS

DUAL

METERS

SPECIFICATIONS

O-SO VDC, continuously

var-

iable. Two ranges,

0-25

and

O-50 VDC.
O-2 amperes. Four ranges:

O-SO

mA, 0-0.2A. 0-0.5A,

and

0-2A.
5% to 100% of each current

range.
Maximum 0.1%. typical

0.07%.

LINE REGULATION

RIPPLE
CURRENT DERATING

SIZE
NET WEIGHT

FEATURES

Uses integrated circuits, sil­icon transistors and diodes,
and an SCR. All the advan-

tages of solid state construc­tion are utilized, including:

Dependability-reliability

No warm up time or stab-

ilization delay

Ruggedness

Compact size

Protects load and instrument

against overload.

Curr

ent

limit is fully adjustable from
approximately 2.5 mA to 2
A. The power supply auto­matically shuts down and
the OVERLOAD lamp lights
if the preset current limit is

exceeded. After clearing the

cause of the overload, sim­ply push the set/reset button
to restore normal operation.

Permits setting current limit
without disturbing external

load connections or output

voltage settings: does not

re-

quire

application of short
circuit to output terminals.
Simply

push the set/reset

button and adjust the

cur­rent limit while reading the
setting on the current meter.

Continuously adjustable over

entire range with a single
control; no range switching
required.

Divided into four ranges.
Fully regulated output at all
current levels.

Allows output voltage and

current to be monitored si­multaneously without

switch-

ing

ranges from current to

voltage. Both meters have

overload protection to pre-

vent damage from incorrect
range selection.

FOUR CURRENT

METER RANGES

TWO VOLTMETER
RANGES

STANDBY-DC
ON SWITCH

ON-OFF CONTROL

PILOT LAMP

MECHANICAL
PREREGULATOR

FLOATING OUTPUT

REVERSE POLARITY

PROTECTION

BINDING POSTS

ATTRACTIVE
APPEARANCE

EASY TO OPERATE

Maximum 0.1%. 0.02%

typ-

ical, at output Voltage of

50
VDC and output current of 2
amps

from

105-125

VAC.

5

millivolts peak-to-peak

maximum.

.02 A/°C

above

25°

C am-

bient. (2 A Range only).

14 1/8"

x

3 7/8"

x 10” deep.

11 lbs.

Provides maximum meter

resolution. Selection of me­ter range also selects coarse
current limit setting.

0-25V and

0-5OV

ranges pro-

vide maximum meter resolu­tion. A mechanical stop
prevents the voltage level
control from exceeding

ap-

proximately 25 volts when

the O-25 V range is selected.
Standby mode disconnects

power

supply from load
without disturbing voltage
or current control settings.

On-off switch is combined
with voltage level control to

assure voltage setting of

zero when unit is turned on.
Lights to indicate at a glance

that the unit is turned on.

Power supply’s rectifier in­put voltage increases in pro­gressive steps as output
voltage setting is increased.
Improves efficiency; less
power is converted to heat
at low voltage operation.

Permits referencing the posi­tive or negative output to
any external dc potential or
ground.

Protects against accidental

damage from reverse polar­ity connection to external
power source.

Heavy duty

5-way

binding

posts for positive cmd

nega­tive polarity output and earth
ground.

Modem, functional design.
When more

than

one unit

is

used, units may be stacked.
All controls are

identified
and easy to read. Simplified
operation helps prevent op
erator

mistakes that might

damage equipment.

3

INTRODUCTION

The B & K Precision Model 1601 Regulated DC
Power Supply is a versatile, laboratory quality in­strument which provides regulated dc voltage and
current outputs of 0 to 50 volts and 0 to 2 amperes

respectively. Its high specifications, operating ease,
and special features make it an excellent choice
for most applications requiring a dc power source.
It is especially well suited for powering transis­torized and fully solid state electronic equipment
such as automobile radios and sound systems, bat­tery operated radio receivers, portable radios,
mobile citizen’s band transceivers and Walkie-Talkie

transceivers.

The following list is ‘but a small sample of the

most popular applications for the instrument:

-Service Technicians

-Factory Technicians

-Engineers and
Laboratory
Technicians

-Electronics
Instructors
and Students

CONTROLS AND INDICATORS

Powering equipment or indi­vidual circuits during testing
and trouble-shooting in the
service shop.

Powering complete

equip­ments or individual assem­blies during testing in the

factory.

Powering prototype and ex­perimental circuits and
equipments.

Laboratory exercises in basic
and

advanced electronics.

3

2

1

13

12

11

io

Controls and Indicators

1 current meter

Measures actual output load

4 Push to set

current during normal oper-

CURRENT

ation.

LIMIT or to reset

Indicates current limit value

OVERLOAD

when set/reset button 4 is

button (set/

pushed. reset button)

2 CURRENT

Selects range for current

RANGE switch

meter 1 and coarse setting

of current limit. Full scale

meter

reading

and maxi-

mum current limit of:

0.05A

position

0.2A

position

0.05 ampere

(50

milliamps)

0.5A

position

0.2 ampere

(200

milliamps)

2A position

0.5 ampere

(500

milliamps)

2 amperes

5 OVERLOAD

indicator

(red)

6 POWER indicator Lights continuously while

power supply is turned on.

7 STBY-DCON

switch;
STBY position

l

3 SETCURRENT

LIMIT control

Fine adjustment of current
limit setting. Continuously
adjustable from 5% to 100%
of range which is selected
by CURRENT RANGE switch

2

DC ON position

4

When fully depressed and
held, connects current meter

1

to read the current limit
setting. When pressed and
released, resets overload cir­cuit if it has been tripped.

Lights when current limit has
been exceeded and power

supply output has shut down.

Removes power from output

terminals 9 and 10 and

voltmeter

11 but leaves

power supply activated in a

standby condition.

Applies power to output ter-

minals 9 and

10

and

voltmeter

11

*

c

termina1

Earth and chassis ground
terminal.

9 + terminal

Positive polarity Output ter­minal.

10

-

terminal

Negative polarity output
terminal.

11

voltmeter

Indicates power supply out­put voltage.

12

1.

2.

3.

4.

METER

RANGE
switch
0-5OV

position

Selects full scale range of
50 volts for voltmeter 11

0-25V

position

Selects full scale range of
25 volts for voltmeter

11

OPERATING INSTRUCTIONS

a.

b.

C.
d.

13 LEVEL control

Turn off the power supply before plugging it
into an ac outlet. Turn off by

rotating

the LEVEL

control

13 fully counterclockwise until it

“clicks” off.
Connect the power cord to a 105-125 volt 60 Hz

ac outlet.

WARNING

Use only a polarized

3-wire

outlet. This

assures that the power supply chassis is

connected to a good earth ground and pre­vents danger from electrical shock. If a
2-wire

to

3-wire

adapter must be used, be
sure the ground wire of the adapter is
attached to a good earth ground.

Turn on the power supply by rotating the
LEVEL control 13 slightly clockwise past the
“click”. The POWER indicator 6 will light.

Determine the maximum safe load current for
the device to be powered and set the current
limit for that value as follows:

Set the coarse current limit with the CUR-

RENT RANGE switch 2 . When possible,

select a range that provides the desired cur­rent liiit at a value above 20% of the full

scale

reading.

7

.

Return the “STBYDC ON” switch 7 to the
DC ON position and set the output voltage as
follows:

Push and hold the set/reset button 4 while

making

fine

current limit adjustment with

the SET CURRENT

LIMIT

control 3 for the

desired current limit as read on the current

meter

1 .

a.

Release the set/reset button 4 .

b.

If the maximum safe load current is

un-

known,

start with a low current

lit

setting.
If the setting is too low, the overload circuit
will merely trip when power is applied to
the

load in steps 7 and 8. If so, increase the
current limit setting in small steps until the
overload circuit does not trip during normal
operation.

8. If the load current exceeds the current limit, the
OVERLOAD lamp 5 will light and the power

supply will shut down

.(the

current meter 1

and voltmeter 11 will drop to zero). Restore

;~Iowyw=r supply

to normal operation as

.

.

and prevents LEVEL control

13 from increasing the

voltage above approximately

25 volts.
Turns off power supply at

extreme counterclockwise ro-

tation. Clockwise rotation
turns on power supply and
adjusts output voltage (volt-

age output level is not
changed by the METER
RANGE switch 12 ). Also,
prevents METER RANGE
switch from being set to O-25
V position when LEVEL con­trol is advanced beyond

ap-

proximately 25 volt output.

5.

6.

Set the “STBY-DC ON’ switch 7 to the STBY
position

while

connecting the test leads.

Connect the power supply output to the device
being powered with test leads as follows:

a.

b.

C.

Connect the positive polarity input of the

device being powered to the (+) terminal

9 of the power supply.

Connect the negative polarity input of the
device being powered to the

(-)

terminal

10 of the power supply.

If the positive polarity of the device beiig
powered is also to be ground reference,
jumper the (+) terminal 9 to the

(+ )

ter-

minal 8

.

If the negative polarity of the
device being powered is to be ground ref­erence, jumper the

(-)

terminal 10 to the

(hlterminal

8

.

If neither the positive nor

negative polarity of the device bemg pow-

ered is to be grounded, but the chassis of
the device needs grounding, connect a sep­arate test lead from the chassis of the device
to the ( * 1 terminal8of the power supply.

Set the METER RANGE

switch

12 to the

0-25V

position if the output voltage is to be

set for 25 volts or

less,

or to the

0-50V

posi­tion if the output voltage is to be sat for
more than 25 volts.

Turn LEVEL control 13 clockwise until the

desired output voltage is read on the volt-

meter 11 .

5